Delightfully Dumb
YTtalk Mad
Definitely do something original. Like, "hey, guys!" I don't think anyone's used that yet. 
I just say "hi" on mine then cut to the intro, but not in every video. It took me a loooooong time to come up with that one. Haha.
I just say "hi" on mine then cut to the intro, but not in every video. It took me a loooooong time to come up with that one. Haha.